Gas burner head



H. C. REINHART GAS BURNER HEAD Nov. 18, 1958 2 Sheets-Sheet 1 Filed March 5, 1954 Nov. 18, 1958 Filed March 5, 1954 H. C. REINHART GAS BURNER HEAD 2 Sheets-Sheet 2 FIG.6.

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HOMQOL 0M United States Patent GAS BURNER HEAD Harold C. Reinhart, Ferguson, Mo., assignor to Food Giant Markets, Inc., a corporation of New Jersey Application March 5, 1954, Serial No. 414,339

1 Claim. (Cl. 158-416) The invention relates to burner heads, and more particularly to gas burner heads such as are used on cooking ranges.

This application is a continuation-in-part of my copending application Serial No. 387,875, filed October 23, 1953, entitled Burner Head, and now abandoned.

Among the several objects of the invention may be noted the provision of improved single duty and double duty gas burner heads for use on cooking ranges which are economical to manufacture and install and which provide for efficient combustion; and the provision of a double duty burner head of the class described adapted for reception of a central simmer burner, and providing for flash ignition of the latter. Other objects and features will be in part apparent and in part pointed out hereinafter.

In the accompanying drawings, in which several of various possible embodiments of the invention are illustrated,

Fig. 1 is a Vertical cross section through a burner assembly including a double duty burner head of this invention;

Fig. 2 is a plan of the double duty burner head per se as shown in, but removed from, the assembly of Fig. 1;

Fig. 3 is a bottom view of Fig. 2;

Fig. 4 is an elevation of Fig. 2;

Fig. 5 is an elevation of a modification of the burner head shown in Figs. 1-4; and,

Fig. 6 is a vertical cross section of Fig. 5.

Corresponding referen e characters indicate corre sponding parts throughout the several views of the drawings.

Referring to the drawings, Fig. 1 shows a double-duty burner head 1 of this invention as it is mounted in a typical burner assembly for a cooking range. The assembly includes a sheet-metal tray 3 (a fragment of which appears in Fig. 1). This tray is formed with a cuff 5 having the shape of a truncated cone. The cuff projects upward from the tray and has an inwardly directed annular flange 7 at its upper end. An annular offset 9 is formed around the bottom of the cuff for the reception and spot Welding of a flange 11 of an individual smaller sheet metal cuff 13 of cylindric shape. Cuff 13 has a necked-down upper end 15 which reaches into the opening 17 bounded by flange 7. In the flange 11 of cult 13 is a gas inlet opening 19 for admitting gas to the annular space 21 between the two cuffs. Fuel gas and primary air are supplied to opening 19 via a mixing tube 23. Fuel gas and primary air pass from space 21 through the opening 17 between the upper end of cuff 13 and flange 7. The upper end 15 of the cuff 13 is provided with an inner spun internally threaded ferrule 25. Aligned side openings 27 and 29 are formed in the cuffs 5 and 13, respectively. Connecting these openings is a cylindric thimble 31. The outer end of this thimble is telescoped and welded on an inwardly directed flange 33 around 2,860,696 Patented Nov. 18, 1958 the opening 27. The inner end of the thimble has an inwardly directed flange 35, with a spun ferrule 37 attaching it around the opening 29. A flash tube 39 extends through the thimble to the opening 29, being supported by a bracket 41 welded to the tray 3.

The burner head 1 consists of a one-piece body of cast aluminum, iron, or the like, generally of mushroom or umbrella shape; It has inner and outer rings 43 and 45 joined by integral spokes 47. The outer ring has an inner depending hollow stem 49 and an outer depending rim 51. The stem is longer than the depth of the rim and is externally threaded as indicated at 53.for threading it into the ferrule 25. The outer diameter of the outer ring 45 corresponds generally to the outer diameter of the top of the cuff 5, and the width of the rim 51 corresponds generally to thewidth of the flange 7. The outer ring 45 is preferably of arched radial section, as appears in Fig. 1. The rim 51 of the outer ring 45 has a series of flat bottom notches 55 extending from the inside to the outside. These are spaced at equal intervals all around the rim. The portions of the rim between the notches constitute lands designated 57. Each notch is centered on a radius of the ring and has generally parallel sides 59 and a flat top 61, thereby having a constant cross section throughout its length. The lands 57 are accordingly wedge-shaped (see Fig. 3). The notches are shallow as compared to their peripheral Widths and as compared to their radial lengths, i. e., depth of the rim. The rim also has a series of radial holes 63 in a plane above the plane of 'the tops of the notches. These holes, which are round and drilled completely through the rim to extend from the inside to the outside, are spaced'at equal intervals all around the rim, their outer ends generally being centered approximately above the outer ends of the sides 59 of the notches. The opening in theinner ring 43 is designated 65. This is enlarged at its upper end to form a seat 67 for the reception of a simmer burner 69 (see Fig. l). The outer ring 45 has a milled radial slit 71 which intersects one of the radial holes 63, but which does not reach to a notch 55. j

As shown in Fig. 1, the burner head 1 is installed simply by threading stem 49 into the ferrule 25 to the point where the lands 57 of the rim 51 of the outer ring 45 of the burner head engage against the flange 7 at the top of cufl. 5. A fuel-air mixing pipe 70 hasa vertical end extension 73 which reaches upward within the cuff 13. The simmer burner 69 is threaded in the upper end of extension 73 to the point where it engages the seat 67. A nozzle 75 in extension 73 facing opening 29 provides gas outlet passages from extension 73. This figure also shows that the depths of the notches 55 are smaller than the diameters of the holes 63.

It will be understood that in the operation of the range in which the above-described assembly is used, upon turning a gas cock (not shown) gas is first supplied to the pipe 70 and thus to the'simmer burner 69. Gas then flows out from nozzle 75 and travels through the flash tube 39 to a pilot burner (not shown), resulting in a flash back which ignites the simmer 'burner 69. Then as the gas cock is further turned, a mixture of gas and primary air is supplied to the space 21 via pipe 23 and opening 19. The mixture of gas and primary air flows out of space 21 through the opening 17 to the annular chamber 77 defined by the ring 45 in conjunction with its inner stem 49 and outer rim 51. From this chamber, the mixture flows radially outward through the ports provided by the notches 55 in conjunction with the flange 7 and through the holes 63, and is flash ignited via the radial slit 71 from the already ignited simmer burner 69. Accordingly, relatively wide flat flame jets issue from the notches 55, and small circular flame jets issue from the holes 63. Adjacent the outer, periphery of rim 51, the jets issuing from the notches 55 are spaced apart the width of the outer ends of lands 57. Secondary air fiows up around the outside of edit 5 to the jets issuing from notches 55, and flows upward through the stated spaces between jets issuing fromnotches 55 to the holes 63, noting that the outer end of each hole is partly above a land and hence in the path of secondary air flowing upward between the jets issuing from notches 55. This efiects efficient combustion. The reliability of ignition of gas issuing from the burner head 1 from the simmer burner 69 is enhanced by having the slit 71 intersect a hole 63.

The one-piece head may be readily and economically manufactured by forging, permanent molding, sand casting, 'die casting or the like. The only machining operations required are the threading of stem 49, the drilling ofholes '63, and the-:cutting ofslit 71, all of which are simple and economical operations.

*As above described, the burner head 1 is a double duty head in that it provides for mountinga central-simmer'burner. The principles'of the invention are applicable to a single duty head made exactly like the head It but omitting the inner ring 43 andspokes 47, noting that the single duty head is used without a simmer burner.

Figs. Sand 6 illustrate a burner head 1a corresponding in all respects to the above-described head 1 with the addition of a second series of holes 6311 located above the lands 57 in'radial planes which are generally centered with respect to the lands,'holes 63a being above the horizontal planeot the holes 63. The holes 63a are preferably inclined upward at a slight angle (5, for example) from theinside to the outside of the rim 51. They have the function'of insuring that ignition is carried completely around the-burner, even at a low rate of flow.

= In view of the above, it willbe seen that the several objectsof the invention are achieved and other advantageous results attained. 7

As various changes could'be made in the above constructions without departi'ng from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall '4 be interpreted as illustrative and not in a limiting sense.

I claim:

A cooking range burner comprising inner and outer cufis forming an annular mixing chamber, the inner cuff having an internally threaded part on its end, the outer cutt having an inwardly directed fiat annular flange which is integral therewith, a one-piece head having an inner hollow stem threaded into said threaded part and having an integral outer depending'rim, said rim having a series of shallow horizontally flat notchesextending from the inside to the outside of the rim and the seat and forming fiat-bottomed lands between them, said lands flatly-em gaging with said inwardly directed flat flange, a first group of radially directed horizontal round holes extending through the rim, pairs of adjacent holes having their respective outlets directly above the lateral margins of said flat notches for access to secondary air between said notches, and a second group of. upwardly and outwardly directed holes extending through the rim and having their outlets located at an elevation above the outlets of the first group of holes, each outlet of the second group of holes being located above a land for access to secondary air between said notches and first group of holes, said second group of holes being adapted for complete peripheral ignition throughout thefirst group of holes and notches for all, including low, rates of gas flow, the depths perpendicular to said flat seat of said notches being no greater than the diameters of said holes and being substantially less than the peripheral widths and radial lengths of the notches themselves.

References Cited in the file of this patent UNITED STATES PATENTS 1,923,393 Pickup -Aug. 22, 1933 2,539,101 Reeves Jan. 23, 1951 2,573,502 Smith Oct. 30, 1951 2,640,531 Lamar June 2, 1953 2,646,112 Brodbeck July 21, 1953 FOREIGN PATENTS 211,192 M Germany Dec. 25, 1908 259,868 Germany May lS, 1913 766,815 France L Apr; 23, 1934 

